As others have said, you need to take a step back, and find some rest
I'll also add a thought : creativity comes from your lived experiences, the more you discover new ideas, exchange with new people, understand new cultures, the more matter you'll have at your disposal to pick from when looking for creative solutions to whatever you're working on. Go on holidays, visit a museum, buy a concert ticket, the more you put yourself out there to be available for new experiences, the more creative you'll be.